/* Copyright (c) 2020 XEPIC Corporation Limited */
/*
 * Copyright (c) 2002-2012 Michael Ruff (mruff at chiaro.com)
 *
 *    This source code is free software; you can redistribute it
 *    and/or modify it in source code form under the terms of the GNU
 *    General Public License as published by the Free Software
 *    Foundation; either version 2 of the License, or (at your option)
 *    any later version.
 *
 *    This program is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *    GNU General Public License for more details.
 *
 *    You should have received a copy of the GNU General Public License
 *    along with this program; if not, write to the Free Software
 *    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
 * USA.
 */

#include <assert.h>
#include <stdlib.h>
#include <string.h>
#include <veriuser.h>
#include <vpi_user.h>

/*
 * tf_getlongp implemented using VPI interface
 */
int tf_getlongp(int *highvalue, int n) {
  vpiHandle sys_h, sys_i, arg_h = 0;
  s_vpi_value value;
  int len, rtn;

  assert(highvalue);
  assert(n > 0);

  /* get task/func handle */
  sys_h = vpi_handle(vpiSysTfCall, 0);
  sys_i = vpi_iterate(vpiArgument, sys_h);

  /* find nth arg */
  while (n > 0) {
    if (!(arg_h = vpi_scan(sys_i))) assert(0);
    n--;
  }

  /* get the value */
  value.format = vpiHexStrVal;
  vpi_get_value(arg_h, &value);

  /* convert string to int(s) */
  len = strlen(value.value.str);
  if (len > 8) {
    char *str;
    /* low word */
    str = value.value.str + (len - 8);
    rtn = (int)strtoul(str, 0, 16);
    /* high word */
    *str = '\0';
    *highvalue = (int)strtoul(value.value.str, 0, 16);
  } else {
    *highvalue = 0;
    rtn = (int)strtoul(value.value.str, 0, 16);
  }

  vpi_free_object(sys_i);

  return rtn;
}
